Spark-plug protector.



'G. R. LANMAN.

SPARK PLUG PROTECTOR.

APPLICATION FILED Nov. 4. ms.

Patented Nov. 6, 1917.

WITNESSES ATTORNEY tor detached.

GUY B. LANMIAN, OF EL RENO, OKLAHOMA.

SPARK-PLUG- PROTECTOR.

Specification of Letters Patent.

Patented Nov. 6, 1917.

Application filed November 4, 1916. Serial No. 129,558.

To all whom it may concern:

Be it known that I, GUY R. LAnrrAN, a citizen of the United States,resldlng at El Reno, in the county of Canadlan and State of Oklahoma,have invented new and useful Improvements 'in Sparkdlug Protectors, ofwhich the following is a specification. I

This invention relates to spark plug protectors, the object in viewbeing to prov1de a spark plug protecting device which may be readilyapplied to any spark plug whether applied to or detached from a cyllnderand which when in its proper position Wlll protect the spark plug frombeing struck by flying or falling objects, which will also prevent waterfrom reachin the spark plug and causing a short circuit andwhich willalso'protect and hold a sufiicient portion of the circuit wire leadingto the plug prevent said wire from sagging and causing the extremitythereof to become loose or detached from the binding post thereof.

With the above and other objects in view the invention consists in thenovel construction, combination and arrangement of parts, hereindescribed, illustrated and claimed.

In the accompanying drawing Figure l is a side elevation of the devlceshown applied to a spark plug in turn shown ap lied to a fragment of acylinder.

ig. "2 is a vertical longitudinal sectlon through the protector, showingthe plug and a portion of the circuit wire in elevatlon.

Fig. 3 is a perspective view of the protec- The protector contemplatedin this invention, in the referred embodiment-thereof is formed ofslieet metal in a single piece, the metal being of any suitablethickness or gage. The metal blank is so shaped and out that when foldedor rolled into its final shape, the protector comprises a vertical armor leg 1, and a substantially horizontal arm or. leg 2 which is smallerin cross section than the arm or leg l-and preferably made tapering fromits point of junction from the arm 1 to the extremity of the arm 2, botharms being tubular in cross section'but being split longitudinally asindicated at 3 and 4.

The long and short arms or legs of the device are connected together inthe form'of an elbow 5 and the internal dimensions of said elbow andalso of. the arm or leg 1 are such as to prevent the binding post orupper extremity of the power electrode and the screw 9 is insertedthrough inal 16 to the'binding the wire and the crystal ization of fromother causes.

current wire from coming in contact with the protector which would causea short circuit.

The vertical arm of the protector is pro vided adjacent to the lowerextremity there of with substantially parallel projecting ears or lugs6, one of which has its marginal portions turned outwardly to provideflanges 7 extending at right angles to each other to embrace a nut 8which is held by the flanges and prevented from turning. If desired thenut 8 may be soldered or otherwise permanently fastened to said flanges.A clamping both of theears or lugs and through said nut so that bytightening said screw, the lower marginalportion of the vertical leg ofthe device is clamped securely around the plug and in this way thedevice as a whole is positioned upon the plug and securely held in fixedre-. lation thereto.

In like manner the extremity of the horizontal or overhanging arm or legof the protector is formed ears or lugs 10 one of which is marginallybent to provide flanges 11 to embrace a nut 12 and prevent the latterfrom turning. This nut like the one at the face of the upright 7 portionof the protector may be soldered or otherwlse permanently fastened inplace. A

clamping screw 1.3 is inserted through the with substantlally parallelears or lugs at the extremity of the overhanging arm for the purpose ofcontracting the extremity of said arm around an insulating Washer orbushing 14 inserted in the end of said overhangin arm and havin anopening through which the current wire 15 passes, said wire beingconnected by a termithe plug in the usual way.

From the foregoing description taken in connection with the accompanyingdraw ings, it will now be apparent that the plu and the adjacent portionof the wire lea ing to the plug, as well as connections between the wireand plug are all protected against the entrance of water and againstbeing struck by flying or fallin objects; The plug and its connectionsare ept free from dirt, the wire leading to the plu is prevented fromvibrating close to the p ug thereby preserving the connections betweenplug and preventing the breaka e of the wire at such point throu h T ebushing at the extremity of the overhanging post or electrode of ile Ihave descrlbed the protector as constructed of metal, it'will of coursebeunderstood that any suitable material may be employed in theconstruction of said pro tector such as rubber, asbestos and the like. Ido not desire to be limited to the particular form of protector hereinshown and described as it will be apparent that the device issusceptible to changes in the form proportion and minor details ofconstruction which may accordingly be resorted to without departing fromthe principle or sacrificing plny of the advantages of the invention.

e prefera 1y so constructed that it will spread to enable it to beassociated with thereonductor or wire and plug without disconnecting thewire from the lug,"the metal of which the protector is ormed hav'ficient sprin or resiliency to allow or its operation. f desired theprotector may be lined throughout with insulating material to preventany possibility of short circuit.

rotector herein above described is suf- I'claim: I

1. The combination with a spark plug, a feed wire leading thereto, of aprotector constructed to cover the upper portion of the plug and theadjacent portion of the feed wire, said protector embodying two tubulararms extendin at an angle to each other and split longitudinally, andmeans on one. of said arms for clamping the same around 'wire, saidprotector embodying two tubular arms extending at an angle to each otherand split longitudinally, means on one of saidarms for clamping the samearound a spark plug, an insulating bushing in the other arm of the.protector through which the lead wire passes, and means carried by thelast named arm for clamping said bushin in place.

11 testimonywhereof I aflix my signature.

GUY R. LANMAN.

